diff --git a/ch03.ipynb b/ch03.ipynb
index 942a537..3f910a5 100644
--- a/ch03.ipynb
+++ b/ch03.ipynb
@@ -40,7 +40,7 @@
    "outputs": [],
    "source": [
     "url = (\n",
-    "    \"http://biostat.mc.vanderbilt.edu/\"\n",
+    "    \"https://biostat.app.vumc.org/\"\n",
     "    \"wiki/pub/Main/DataSets/titanic3.xls\"\n",
     ")\n",
     "df = pd.read_excel(url)\n",